本文主要介绍一下，在APS.NET中文件的简单上传于下载，上传是将文件上传到服务器的指定目录下，下载是从存入数据库中的路径，从服务器上下载。
1.上传文件
(1)页面代码
<table align="center" cellpadding="0" cellspacing="0" width="100%"><tr><td align="right">文件名称：</td><td><asp:TextBox ID="FileName" runat="server"></asp:TextBox></td><td></td></tr> <tr><td align="right">浏览：</td><td><asp:FileUpload ID="FileUpload1" runat="server" /></td><td></td></tr> <tr><td></td><td><asp:Button ID="UploadButton" runat="server" Text="上传" onclick="UploadButton_Click" /><asp:Label ID="Msg" runat="server" ForeColor="#FF0000"></asp:Label> </td><td></td></tr> </table>
(2).后台代码
protected void UploadButton_Click(object sender, EventArgs e){Msg.Text = "";MyWebSite.DAL.FileInfo file = new MyWebSite.DAL.FileInfo();if (string.IsNullOrEmpty(FileName.Text)){Msg.Text = "请输入文件名";return;}if (FileUpload1.HasFile){try{DateTime upload = DateTime.Now;string flag = Path.GetExtension(FileUpload1.PostedFile.FileName);string path = Server.MapPath("../Upload/" + FileUpload1.FileName);string size = (FileUpload1.PostedFile.ContentLength / 1024).ToString();FileUpload1.SaveAs(path);file.FileName = FileName.Text.ToString();file.Type = flag;//获得文件格式file.Size = size;//文件大小file.FilePath = path;//上传到服务器的绝对路径file.UploadTime = DateTime.Now.ToShortDateString();//上传时间handler.AddFile(file);//将上传的文件信息保存到数据库Msg.Text = "上传成功！";}catch{Msg.Text = "上传失败！";}}}
2.下载文件
(1)前台页面
<asp:Repeater ID="Repeater1" runat="server" onitemcommand="down_file_Click"><ItemTemplate> <table width="90%" align="center" border="1" cellpadding="1" cellspacing="0" bgcolor="#e1e1e1" class="title_font"><tr><td class="title_font" width="10%" align="center">文件名称：</td><td width="20%"align="center"><b><asp:Label ID="FileTitle" runat="server" Text='<%#Eval("文件名称") %>'></asp:Label></b></td><td width="6%"align="center">类型：</td><td width="6%"align="center"><%#Eval("类型") %></td> <td width="10%" align="center">文件大小：</td><td width="8%"align="center"><%#Eval("文件大小") %>KB</td><td width="10%"align="center">上传时间：</td><td ><%#Eval("上传时间") %></td><td width="10%" colspan="2" align="center"><asp:LinkButton ID="LinkButton1" CommandArgument='<%#Eval("link") %>' runat="server">下载文件</asp:LinkButton></td></tr> </table><br /></ItemTemplate> </asp:Repeater>
(2)后台代码
1).绑定数据
public void GrvDataBin(List<FileInfo> list){DataView dv = new DataView();DataTable dt = new DataTable("fileMeta");{dt.Columns.Add("文件名称");dt.Columns.Add("类型");dt.Columns.Add("上传时间");dt.Columns.Add("文件大小");dt.Columns.Add("link");}foreach (FileInfo fileM in list){DataRow row = dt.NewRow();row[0] = fileM.FileName;row[1] = fileM.Type;row[2] = fileM.UploadTime;row[3] = fileM.Size;row[4] = fileM.FilePath;dt.Rows.Add(row);}dv.Table = dt;Repeater1.DataSource = dv;Repeater1.DataBind();}
2).下载文件
protected void down_file_Click(object sender, RepeaterCommandEventArgs e){System.IO.FileStream fs = null;try{string filePath = e.CommandArgument.ToString();string fileName = ((Label)e.Item.FindControl("FileTitle")).Text.ToString();fs = System.IO.File.OpenRead(filePath);byte[] buffer = new byte[1024];long count = 1024;Response.Buffer = true;Response.AddHeader("Connection", "Keep-Alive");Response.ContentType = "application/octet-stream";Response.AddHeader("Content-Disposition", "attachment;filename=" + Server.UrlEncode(System.IO.Path.GetFileName(filePath)));//下载时要保存的默认文件名Response.AddHeader("Content-Length", fs.Length.ToString());while (count == 1024){count = fs.Read(buffer, 0, 1024);Response.BinaryWrite(buffer);}}catch (Exception ex){return;}finally{fs.Close();}}
以上就完成了，简单的文件上传与下载。
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